First time ls swap
 

this is my first ls swap and i have a lot of questions because i cant really find answers. i have a 1986 Chevy caprice brougham that i want to ls swap. the first question is does the stock oil pan clear the frame or do i have to change the oil pan, because i would prefer not to, out of budget reasons? also it has the drive by wire throttle body, but i was wondering if i buy the holley terminator x max can i just change the throttle body to the cable version and extend the throttle cable from the stock chevy caprice pedal. the last thing is, is there anyway to use my stock tank or would it be easier to just use a fuel cell oooooor maybe use a efi tank from a 91-96 chevy caprice? any info is greatly appreciated!